
946 Controller Instruction Manual
pg. 127
13 Appendix
13.1
MFC Gas Conversion Factors for Selected Gases
Note
: Standard pressure is defined as 760 Torr (mmHg). Standard temperature is defined as 0
o
C.
Gas
Symbol
Cp
Cal/g K)
Density
g/l @ 0
o
C
Conversion
Factor
Air
0.240
1.293
1.00
Ammonia
NH
3
0.492
0.760
0.73
Argon
Ar
0.1244
1.782
1.39
Arsine
AsH
3
0.1167
3.478
0.67
Boron Trichloride
BCl
3
0.1279
5.227
0.41
Bromine
Br
2
0.0539
7.130
0.81
Carbon Dioxide
CO
2
0.2016
1.964
0.70
Carbon Monoxide
CO
0.2488
1.250
1.00
Carbon Tetrachloride
CCl
4
0.1655
6.86
0.31
Carbon Tetrafluoride (Freon 14)
CF
4
0.1654
3.926
0.42
Chlorine
Cl
2
0.1144
3.163
0.86
Chlorodifluoromethane (Freon 22)
CHClF
2
0.1544
3.858
0.46
Chloropentafluoroethane (Freon 115)
C
2
ClF
5
0.164
6.892
0.24
Chlorotrifluoromethane (Freon 13)
CClF
3
0.153
4.660
0.38
Cyanogen
C
2
N
2
0.2613
2.322
0.61
Deuterium
D
2
1.722
0.1799
1.00
Diborane
B
2
H
6
0.508
1.235
0.44
Dibromodifluoromethane
CBr
2
F
2
0.15
9.362
0.19
Dichlorodifluoromethane (Freon 12)
CCl
2
F
2
0.1432
5.395
0.35
Dichlorofluromethane (Freon 21)
CHCl
2
F
0.140
4.592
0.42
Dichloromethysilane
(CH
3
)
2
SiCl
2
0.1882
5.785
0.25
Dichlorosilane
SiH
2
Cl
2
0.150
4.506
0.40
1,2-Dichlorotetrafluoroethane (Freon 114)
C
2
Cl
2
F
4
0.160
7.626
0.22
1,1-Difluoroethylene (Freon 1132A)
C
2
H
2
F
2
0.224
2.857
0.43
2,2-Dimethylpropane
C
5
H
12
0.3914
3.219
0.22
Ethane
C
2
H
6
0.4097
1.342
0.50
Fluorine
F
2
0.1873
1.695
0.98
Fluoroform (Freon 23)
CHF
3
0.176
3.127
0.50
Freon 11
CCl
3
F
0.1357
6.129
0.33
Freon 12
CCl
2
F
2
0.1432
5.395
0.35
Freon 13
CClF
3
0.153
4.660
0.38
Freon 13B1
CBrF
3
0.1113
6.644
0.37
Freon 14
CF
4
0.1654
3.926
0.42
Freon 21
CHCl
2
F
0.140
4.592
0.42
Freon 22
CHClF
2
0.1544
3.858
0.46
Freon 23
CHF
3
0.176
3.127
0.50
Freon 113
C
2
Cl
2
F
3
0.161
8.360
0.20